Backlight Assembly Dual-View Display Microstructures
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Solution Overview
Problem
Dual-view display technologies compromise image resolution to achieve dual-view functionality, as they typically utilize gratings or cylindrical lenses to direct light for odd and even pixel arrays, resulting in images being viewed at different angles but with reduced resolution.
Innovation Solution
A backlight assembly with parallel first and second light guide plates and microstructures that control light emission angles, allowing for dual-view display without resolution loss by alternating lighting between the light sources and guide plates, ensuring images are viewed at distinct angles with maintained resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a grating or cylindrical lens is used to guide light for dual-view display, then different images can be displayed at different viewing angles, but the image resolution is reduced to half of normal display
Solution Approach 1:
The light guide plate is divided into multiple independent light guide regions (first light guide region, second light guide region, third light guide region) that can be independently controlled. Each region corresponds to different pixel arrays and viewing angles, allowing simultaneous display of multiple images at different resolutions for different viewers without compromising overall image quality
Solution Approach 2:
Different microstructures are applied to different regions of the light guide plate surface. The first light guide region has microstructures optimized for first pixel arrays, the second light guide region has microstructures for second pixel arrays, enabling each region to independently control light emission characteristics for its designated viewing angle and resolution requirement
2Adaptability or versatility
If odd and even pixel columns are used to display different pictures, then dual-view display is achieved, but the resolution of dual-view pictures is half that of normal display
Solution Approach 1:
The display is segmented into multiple independent viewing zones with dedicated light guide regions and pixel arrays. Each zone maintains full resolution by having its own complete set of pixel columns rather than sharing alternating columns, eliminating the resolution loss inherent in interlaced pixel schemes
Solution Approach 2:
The patent transitions from a temporal multiplexing approach (alternating odd/even pixels) to a spatial dimensioning approach (multiple parallel light guide regions). By adding the dimension of spatial separation for different viewing angles, each viewer receives a complete, full-resolution image rather than a downsampled version
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables dual-view display without sacrificing image resolution by using microstructures on light guide plates to control light emission angles, allowing for high refresh rates and efficient light utilization, suitable for applications requiring consistent image quality at varying viewing angles.
Implementation Method 1
light emitted by the first light source is able to be emitted from a surface of the first light guide plate facing the second light guide plate at a first set emitting angle, after being incident into the first light guide plate and reflected by the plurality of first microstructures
Data Source
AI summary
Disclosed is a backlight assembly, including first and second light guide plates, and first and second light sources; light emitted by the first light source can be emitted from a surface of the first light guide plate facing the second light guide plate at a first set emitting angle, after being incident into the first light guide plate and reflected by a plurality of first microstructures disposed on a surface of the first light guide plate facing away from the second light guide plate; light emitted by the second light source can be emitted from a surface of the second light guide plate facing away from the first light guide plate at a second set emitting angle, after being incident into the second light guide plate and reflected by a plurality of second microstructures disposed on a surface of the second light guide plate facing the first light guide plate.